Accessing non-existing public link should return 404, not 500

[PVince81]

Steps

Run test "Uploading file to a public upload-only share using new public API that was deleted does not work" from "tests/acceptance/features/apiSharePublicLink2/uploadToPublicLinkShare.feature:61"

Expected

404 error

Actual

500 error

Logs

==> reva-frontend.log <==
2020-06-18T14:31:21+02:00 ERR error sending grpc stat request error="rpc error: code = Unknown desc = gateway: grpc failed with code CODE_NOT_FOUND" pkg=rhttp service=reva traceid=d1f9cc025d3d809d27f39a68b6286c6a
2020-06-18T14:31:21+02:00 ERR http end="18/Jun/2020:14:31:21 +0200" host=127.0.0.1 method=PUT pkg=rhttp proto=HTTP/1.1 service=reva size=0 start="18/Jun/2020:14:31:21 +0200" status=500 time_ns=160803601 traceid=d1f9cc025d3d809d27f39a68b6286c6a uri=/remote.php/dav/public-files/SOqHuPhZGPei/whateverfilefortesting.txt url=/remote.php/dav/public-files/SOqHuPhZGPei/whateverfilefortesting.txt

Seems it's simply some missing error handling where the GRPC code must be translated to an HTTP response.

[PVince81]

Could be similar to https://github.com/owncloud/ocis-reva/issues/280

[PVince81]

similar issue in OC 10: owncloud/core#36055

[refs]

This is not on any expected failures. Is it still the case that it fails?